diff options
Diffstat (limited to 'lib/libppmd.c')
| -rw-r--r-- | lib/libppmd.c | 309 |
1 files changed, 156 insertions, 153 deletions
diff --git a/lib/libppmd.c b/lib/libppmd.c index a94ff107..e0654c8f 100644 --- a/lib/libppmd.c +++ b/lib/libppmd.c @@ -1,4 +1,4 @@ -/* +/* ** ** This library module contains the ppmdraw routines. ** @@ -10,7 +10,7 @@ ** copyright notice and this permission notice appear in supporting ** documentation. This software is provided "as is" without express or ** implied warranty. -** +** ** The character drawing routines are by John Walker ** Copyright (C) 1994 by John Walker, kelvin@fourmilab.ch */ @@ -85,7 +85,7 @@ pointIsWithinBounds(ppmd_point const p, return (p.x >= 0 && p.x < cols && p.y >= 0 && p.y < rows); } - + static ppmd_point vectorSum(ppmd_point const a, @@ -102,7 +102,7 @@ static long int const DDA_SCALE = 8192; /* Several factors govern the limit of x, y coordination values. - The limit must be representable as (signed) int for coordinates to + The limit must be representable as (signed) int for coordinates to be carried in struct penpos (immediately above). The following calculation, done with long ints, must not overflow: @@ -112,7 +112,7 @@ static long int const DDA_SCALE = 8192; dy = (y1 - y0) * DDA_SCALE / abs(x1 - x0); Overflow conditions for ppmd_text are rather complicated, for commands - come from an external PPMD font file. See comments below. + come from an external PPMD font file. See comments below. */ @@ -141,10 +141,10 @@ ppmd_validatePoint(ppmd_point const p) { static void drawPoint(ppmd_drawprocp drawproc, const void * const clientdata, - pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, + pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, ppmd_point const p) { /*---------------------------------------------------------------------------- Draw a single point, assuming that it is within the bounds of the @@ -152,7 +152,7 @@ drawPoint(ppmd_drawprocp drawproc, -----------------------------------------------------------------------------*/ if (drawproc == PPMD_NULLDRAWPROC) { const pixel * const pixelP = clientdata; - + assert(p.x >= 0); assert(p.x < cols); assert(p.y >= 0); assert(p.y < rows); @@ -176,7 +176,7 @@ makeDrawProcXY(ppmd_drawproc * const drawProc, retval.drawProc = drawProc; retval.clientData = clientData; - + return retval; } @@ -204,10 +204,10 @@ drawProcPointXY(pixel ** const pixels, void -ppmd_point_drawprocp(pixel ** const pixels, - unsigned int const cols, - unsigned int const rows, - pixval const maxval, +ppmd_point_drawprocp(pixel ** const pixels, + unsigned int const cols, + unsigned int const rows, + pixval const maxval, ppmd_point const p, const void * const clientdata) { @@ -218,16 +218,16 @@ ppmd_point_drawprocp(pixel ** const pixels, void -ppmd_point_drawproc(pixel** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const x, - int const y, +ppmd_point_drawproc(pixel** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const x, + int const y, const void* const clientdata) { ppmd_point p; - + p.x = x; p.y = y; @@ -264,14 +264,14 @@ findRectangleIntersection(struct rectangle const rect1, void -ppmd_filledrectangle(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const x, - int const y, - int const width, - int const height, +ppmd_filledrectangle(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const x, + int const y, + int const width, + int const height, ppmd_drawproc drawProc, const void * const clientdata) { @@ -437,16 +437,16 @@ clipEnd1(ppmd_point const p0, at 0. -----------------------------------------------------------------------------*/ ppmd_point c1; - /* The current clipped location of p1; we clip it multile times + /* The current clipped location of p1; we clip it multiple times to get the final location. */ /* p0 is in the frame: */ assert(p0.x >= 0 && p0.x < cols); assert(p0.y >= 0 && p0.y < rows); - + /* Clip End 1 of the line horizontally */ c1 = p1; /* initial value */ - + if (c1.x < 0) { /* We know the line isn't vertical, since End 0 is in the frame and End 1 is left of frame. @@ -460,7 +460,7 @@ clipEnd1(ppmd_point const p0, c1.y = c1.y + (p0.y - c1.y) * (cols - 1 - c1.x) / (p0.x - c1.x); c1.x = cols - 1; } - + /* Clip End 1 of the line vertically */ if (c1.y < 0) { /* We know the line isn't horizontal, since End 0 is in the frame @@ -524,10 +524,10 @@ clipLine(ppmd_point const p0, static void drawShallowLine(ppmd_drawprocp drawProc, const void * const clientdata, - pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, + pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, ppmd_point const p0, ppmd_point const p1) { /*---------------------------------------------------------------------------- @@ -571,10 +571,10 @@ drawShallowLine(ppmd_drawprocp drawProc, static void drawSteepLine(ppmd_drawprocp drawProc, const void * const clientdata, - pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, + pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, ppmd_point const p0, ppmd_point const p1) { /*---------------------------------------------------------------------------- @@ -617,10 +617,10 @@ drawSteepLine(ppmd_drawprocp drawProc, void -ppmd_linep(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, +ppmd_linep(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, ppmd_point const p0, ppmd_point const p1, ppmd_drawprocp drawProc, @@ -662,14 +662,14 @@ ppmd_linep(pixel ** const pixels, void -ppmd_line(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const x0, - int const y0, - int const x1, - int const y1, +ppmd_line(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const x0, + int const y0, + int const x1, + int const y1, ppmd_drawproc drawProc, const void * const clientData) { @@ -701,10 +701,10 @@ static unsigned int void -ppmd_spline3p(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, +ppmd_spline3p(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, ppmd_point const p0, ppmd_point const ctl, ppmd_point const p1, @@ -740,16 +740,16 @@ ppmd_spline3p(pixel ** const pixels, void -ppmd_spline3(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const x0, - int const y0, - int const x1, - int const y1, - int const x2, - int const y2, +ppmd_spline3(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const x0, + int const y0, + int const x1, + int const y1, + int const x2, + int const y2, ppmd_drawproc drawProc, const void * const clientdata) { @@ -765,10 +765,10 @@ ppmd_spline3(pixel ** const pixels, void -ppmd_polysplinep(pixel ** const pixels, - unsigned int const cols, - unsigned int const rows, - pixval const maxval, +ppmd_polysplinep(pixel ** const pixels, + unsigned int const cols, + unsigned int const rows, + pixval const maxval, ppmd_point const p0, unsigned int const nc, ppmd_point * const c, @@ -777,7 +777,7 @@ ppmd_polysplinep(pixel ** const pixels, const void * const clientdata) { ppmd_point p; - + unsigned int i; assert(nc > 0); @@ -796,17 +796,17 @@ ppmd_polysplinep(pixel ** const pixels, void -ppmd_polyspline(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const x0, - int const y0, - int const nc, - int * const xc, - int * const yc, - int const x1, - int const y1, +ppmd_polyspline(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const x0, + int const y0, + int const nc, + int * const xc, + int * const yc, + int const x1, + int const y1, ppmd_drawproc drawProc, const void * const clientdata) { @@ -837,10 +837,10 @@ ppmd_polyspline(pixel ** const pixels, void -ppmd_spline4p(pixel ** const pixels, - unsigned int const cols, - unsigned int const rows, - pixval const maxval, +ppmd_spline4p(pixel ** const pixels, + unsigned int const cols, + unsigned int const rows, + pixval const maxval, ppmd_point const endPt0, ppmd_point const endPt1, ppmd_point const ctlPt0, @@ -862,12 +862,12 @@ ppmd_spline4p(pixel ** const pixels, void -ppmd_circlep(pixel ** const pixels, - unsigned int const cols, - unsigned int const rows, - pixval const maxval, +ppmd_circlep(pixel ** const pixels, + unsigned int const cols, + unsigned int const rows, + pixval const maxval, ppmd_point const center, - unsigned int const radius, + unsigned int const radius, ppmd_drawprocp drawProc, const void * const clientData) { /*---------------------------------------------------------------------------- @@ -877,7 +877,7 @@ ppmd_circlep(pixel ** const pixels, it might maintain state that is affected by imaginary points outside the image. - Initial point is 3 o'clock. + Initial point is 3 o'clock. -----------------------------------------------------------------------------*/ if (radius >= DDA_SCALE) pm_error("Error drawing circle. Radius %d is too large.", radius); @@ -936,13 +936,13 @@ ppmd_circlep(pixel ** const pixels, void -ppmd_circle(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const cx, - int const cy, - int const radius, +ppmd_circle(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const cx, + int const cy, + int const radius, ppmd_drawproc drawProc, const void * const clientData) { @@ -1013,11 +1013,11 @@ ppmd_fill_create(void) { stateP->curedge = 0; fillObjP->stateP = stateP; - + /* Turn off line clipping. */ /* UGGH! We must eliminate this global variable */ oldclip = ppmd_setlineclip(0); - + return fillObjP; } @@ -1129,10 +1129,10 @@ continueSegment(struct fillState * const stateP, */ void -ppmd_fill_drawprocp(pixel ** const pixels, - unsigned int const cols, - unsigned int const rows, - pixval const maxval, +ppmd_fill_drawprocp(pixel ** const pixels, + unsigned int const cols, + unsigned int const rows, + pixval const maxval, ppmd_point const p, const void * const clientdata) { @@ -1174,12 +1174,12 @@ ppmd_fill_drawprocp(pixel ** const pixels, void -ppmd_fill_drawproc(pixel** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const x, - int const y, +ppmd_fill_drawproc(pixel** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const x, + int const y, const void * const clientData) { ppmd_fill_drawprocp(pixels, cols, rows, maxval, makePoint(x, y), @@ -1204,7 +1204,7 @@ yxCompare(const void * const c1Arg, ppmd_point const p2 = c2P->point; int retval; - + if (p1.y > p2.y) retval = 1; else if (p1.y < p2.y) @@ -1222,10 +1222,10 @@ yxCompare(const void * const c1Arg, void -ppmd_fill(pixel ** const pixels, - int const cols, - int const rows, - pixval const maxval, +ppmd_fill(pixel ** const pixels, + int const cols, + int const rows, + pixval const maxval, struct fillobj * const fillObjP, ppmd_drawproc drawProc, const void * const clientdata) { @@ -1387,7 +1387,7 @@ static long isin(int deg) static long icos(int deg) { return isin(deg + 90); -} +} static int twosCompByteValue(unsigned char const c) { @@ -1453,7 +1453,7 @@ textPosFromFontPos(ppmd_point const fontPos, /* Position relative to the top left of the whole text box, assuming the text box is horizontal and has font scale. */ - + ppmd_point const ps = makePoint((pl.x * (int)height) / Scalef, (pl.y * (int)height) / Scalef); /* Same as above, but with the text box its actual size */ @@ -1502,7 +1502,7 @@ drawGlyph(const struct ppmd_glyph * const glyphP, text box, in the coordinate system of the canvas. 'rotcos' and 'rotsin' tell how that text box is rotated with respect to the horizontal on the canvas. - + 'height' is the height in canvas pixels of a glyph. This is a scale factor to convert font coordinates to canvas coordinates. -----------------------------------------------------------------------------*/ @@ -1542,7 +1542,7 @@ drawGlyph(const struct ppmd_glyph * const glyphP, glyphOrigin, height, rotcos, rotsin); - + ppmd_linep(pixels, cols, rows, maxval, p, n, drawProc, clientdata); @@ -1565,14 +1565,14 @@ drawGlyph(const struct ppmd_glyph * const glyphP, void -ppmd_textp(pixel** const pixels, - int const cols, - int const rows, - pixval const maxval, +ppmd_textp(pixel** const pixels, + int const cols, + int const rows, + pixval const maxval, ppmd_point const pos, - int const height, - int const angle, - const char * const sArg, + int const height, + int const angle, + const char * const sArg, ppmd_drawprocp drawProc, const void * const clientdata) { /*---------------------------------------------------------------------------- @@ -1608,7 +1608,7 @@ ppmd_textp(pixel** const pixels, unsigned int cursorAdvance; - ppmd_validatePoint(p); + ppmd_validatePoint(p); drawGlyph(glyphP, p, pixels, cols, rows, maxval, height, pos, rotcos, rotsin, @@ -1625,15 +1625,15 @@ ppmd_textp(pixel** const pixels, void -ppmd_text(pixel** const pixels, - int const cols, - int const rows, - pixval const maxval, - int const xpos, - int const ypos, - int const height, - int const angle, - const char * const sArg, +ppmd_text(pixel** const pixels, + int const cols, + int const rows, + pixval const maxval, + int const xpos, + int const ypos, + int const height, + int const angle, + const char * const sArg, ppmd_drawproc drawProc, const void * const clientData) { @@ -1648,13 +1648,13 @@ ppmd_text(pixel** const pixels, /* EXTENTS_DRAWPROC -- Drawproc which just accumulates the extents rectangle bounding the text. */ -static void -extents_drawproc (pixel** const pixels, - int const cols, +static void +extents_drawproc (pixel** const pixels, + int const cols, int const rows, - pixval const maxval, - int const x, - int const y, + pixval const maxval, + int const x, + int const y, const void * const clientdata) { extleft = MIN(extleft, x); @@ -1673,22 +1673,25 @@ extents_drawproc (pixel** const pixels, */ void -ppmd_text_box(int const height, - int const angle, - const char * const s, - int * const left, - int * const top, - int * const right, +ppmd_text_box(int const height, + int const angle, + const char * const s, + int * const left, + int * const top, + int * const right, int * const bottom) { extleft = 32767; exttop = 32767; extright = -32767; extbottom = -32767; - ppmd_text(NULL, 32767, 32767, 255, 1000, 1000, height, angle, s, + ppmd_text(NULL, 32767, 32767, 255, 1000, 1000, height, angle, s, extents_drawproc, NULL); - *left = extleft - 1000; + *left = extleft - 1000; *top = exttop - 1000; *right = extright - 1000; *bottom = extbottom - 1000; } + + + |